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75 lines
2.4 KiB
75 lines
2.4 KiB
const fs = require('fs');
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const fetch = require('isomorphic-fetch');
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const sortby = require('lodash.sortby');
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const request = require('sync-request');
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const ora = require('ora');
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const chalk = require('chalk');
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const endpoint = 'https://www.cryptocompare.com/api/data/coinlist/';
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const spinner = ora('Building currencies').start();
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spinner.color = 'magenta';
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fetch(endpoint)
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.then(response => response.json())
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.then(json => {
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const sorted = sortby(json.Data, o => o.CoinName);
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const symbols = {};
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let imagesSaved = 0;
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/**
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* Build the JSON file based on the cryptocompare coinlist.
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*/
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sorted.forEach((currency, index) => {
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const {Name, CoinName, ImageUrl} = currency;
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symbols[Name] = CoinName;
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// download the image for future use
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if (ImageUrl) {
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spinner.text = `${chalk.gray(index)} ${Name}`;
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spinner.render();
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const res = request('get', `https://www.cryptocompare.com${ImageUrl}`);
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fs.writeFileSync(`images/${Name}.${ImageUrl.split('.').pop()}`, res.getBody());
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imagesSaved += 1;
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}
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});
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spinner.succeed([`${imagesSaved} images saved to /images`]);
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spinner.color = 'yellow';
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spinner.start(`Saving cryptocurrencies.json file`);
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fs.writeFileSync('cryptocurrencies.json', JSON.stringify(symbols, null, 2));
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spinner.succeed(`${sorted.length} currencies saved to cryptocurrencies.json`);
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spinner.start('Saving Readme');
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/**
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* Build the Markdown Table of currencies in the Readme.
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*/
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const template = fs.readFileSync('readme.md').toString();
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const data = JSON.parse(fs.readFileSync('cryptocurrencies.json').toString());
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const newSymbols = Object.keys(data);
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let table = `There are currently **${newSymbols.length} cryptocurrencies** represented*:\n`;
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table += '\n\n';
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table += '| Symbol | Name |\n';
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table += '| :------ | :------ |\n';
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newSymbols.forEach(symbol => {
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table += `| \`${symbol}\` | ${data[symbol]} |\n`;
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});
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table += `\n<small><em>* Last updated: ${new Date().toUTCString()}</em></small>`;
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// Look for the HTML comments in the README as a target
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const targetRegex = /<!-- BEGIN TABLE INJECT -->(\w|\W)*<!-- END TABLE INJECT -->/gim;
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const updated = template.replace(targetRegex, `<!-- BEGIN TABLE INJECT -->\n${table}\n<!-- END TABLE INJECT -->`);
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fs.writeFileSync('readme.md', updated);
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spinner.succeed(['Readme Markdown Table updated']);
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console.log('\n', 'Remember to', chalk.yellow('git commit'), 'and', chalk.yellow('npm publish'));
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})
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.catch(err => console.error(err));
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